Sash balance and lock.



I. D. ANTHE.

BASH BALANCE AND LOGK.

- APPLIOATION FILED JULY 25, 1908- 914,692, Patented Mar. 9, 1909.

2 SHEETS-SHEET 1.

rn: .vumwn PETI'RS cu. wAsn/uc-ra-v, A C

- I. D. ANTHE. SASH BALANCE AND LOCK. APPLICATION Hun JULY 25, 1908.

Patented Mar. 9, 1909.

2 SHEETS-SHEET 2.

FRANK D. ANTHE, OF OOVI NGTON KENTUCKY.

SASH BALANCE AND LOCK.

Specification of Letters Patent.

Patented March 9, 1909.

Application filed July 25, 1908. Serial No. 445,379.

T 0 all whom it may concern:

Be it known that I, FRANK D. ANTHE, a citizen of the United States, residing at Covington, in the county of Kenton and State of Kentucky, have invented certain new and useful Improvements in Sash Balances and Locks, of which the following is a specification.

My invention relates to sash balances and locks and has for its object the providing of a device of this character of simple construction and capable of controlling the operation of both the upper sash and the lower sash and locking the same in adjusted positions or when the same are entirely open or closed.

In my invention I employ a pair of spur gears, one for each sash, one of the sides of each of the sashes being provided with a rack, with novel means for locking and releasing said gears, which invention will be readily understood from the following description and claims and from the drawings, in which latter:

Figure 1 is a front elevation of a window provided with my improved device, partly broken away for better illustration. Fig. 2 is a horizontal section of the same on the line zz of Fig. 1. Fig. 3 is a rear perspective elevation of my improved device. Fig. 4 is a front perspective elevation of the same. Fig. 5 is a plan view of the same. Fig. 6 is a rear elevation of the same. Fig. 7 is a vertical section of the same taken on the line of Fig. 6 and showing the cover of the gear-casing removed. Fig. 8 is a vertical section of my improved device taken on the irregular line :v:c of Fig. 7. Fig. 9 is a detail in section on the line 10 of Fig. 6 showing manner of mounting and operating the detent-blocks. Fig. 10 is a side elevation of the cover for the gear casing. Fig. 11 is a front elevation of the operating key and its escutcheon-plate. Fig. 12 is a side elevation of the same.

1 represents the upper sash and 2 the lower sash.

3 are racks, one of which is let into the longitudinal groove 4. in one of the side edges of each of the sashes.

5 6 are spur gears arranged to mesh with the respective racks. The spur gears are respectively provided with annular flanges 7 8 extending toward each other and forming spring-barrels. A helical spring 9 is received by each barrel, one end thereof being secured to a shaft 11 and the other end thereof received by a slot 12 in the barrel, there being a spring for each barrel similarly secured. The shaft 11 is stationary being secured in the sides 13 of a casing 14, this casing being arranged to be secured in one of theside stiles, as 15, of the window casing 16. The geared barrels are ournaled about said shaft. Said springs serve the purpose of counterbalancing the sashes and are wound to suiiicient extent to have said counterbalancing eii'ect, and are so arranged that when the window-sash is lowered the spring will be wound tighter, the raising of the sash resulting in the partial unwinding of said spring. At the inner end of each barrel there is a cover 17 therefor which has tongues 18 received by recesses 19 in the end of the barrel, the said cover being dished outwardly as shown at 20 so that the dished portions adjacent said shaft may contact with each other and prevent friction between the balance of said covers for providing ease of movement. Said covers preferably have bearing on said shaft.

26 is a rock-sh aft which has reduced ends 27 journaled in apertures 28 in said sides 13, the said rock-shaft preferably being hollow, having a bore of larger diameter 29, which is reduced at the front end of said rock-shaft into the form of a socket 30 of polygonal cross-section for receiving a key 31 which has a long shank 32 also of polygonal cross-section and which may extend past said socket 3O into'said bore 29 to desirable extent so that the same may be accommodated to different thicknesses of window-stiles. 35 is a cross-bar in said casing, preferably secured to the sides thereof.

36 are detent-blocks or dogs sliding in guideways 37 of said cross-bar. T ese guideways are preferably parallel with one of the radii of said spur-gears and the detent blocks slide in said guideways in similar par allel lines so that the tooth ends 38 of said detent-blocks may be received between the teeth of said spur-gears when moved in such parallel lines so that the same may form a di rect obstruction to the rotation of said gears in both directions. By this construction the objection to pivoted pawls is avoided, pivoted pawls having a tendency to swing on their pivots when stress is placed on the gear to rotate itin one of its directions of rotation. By my improved construction the gears are locked and also released by a direct radial movement of said detent-blocks. Said detent-blocks are each provided with a socket j 41 for receiving a lug 42 of said rock-shalt, there being a lug on said rock-shaft for each of said detent-blocks. Said lugs extend into said sockets and move said detent-blocks by engagement with the upper wall 43 or the lower wall 44 on said sockets. Said rock shaft is provided with a pin 45 for preventing over-throw of said rock-shaft by engagement thereof with the cross-bar 35, and thereby preventing the movement of the lugs beyond the range of said sockets.

47 is an escutcheon-plate secured to the inside facing-board 40 of the stile ol' the windowframe. 48 is a spiral spring received about the key 31 between said escutcheonplate and an inner plate 49 secured to the key, as by a pin 50. The sprin 48 urges the handle toward the escutoheon-plate. A preferably elongated handle 46 is on the key and is provided with a pin 52 which is received into either of the holes 53 54 in the escutcheon-plate. When the pin 52 is received in the hole 54 the handle is in up and down po sition and the detent-blocks 36 are in engagement with the teeth of the spur-gears, thereby locking the window-sashes in place. If it is desired to adjust said sashes the handle 46 is pulled outwardly against the resistance of the spring 48, thereby releasing the pin 52 from the hole 54 and the handle is turned so that it will be directed into a sidewardly extending position and the pin 52 allowed to be received by the hole 53. In this manner the position of the handle indicates whether the sashes are locked or unlocked. The handle extends to both sides of the longitudinal axis of the shank 32 so that when the handle is pulled there is a direct pull on said shank, preventing binding of the same. In assembling the casing is secured in the stile of the window casing, distanced from the inside facing-board 40 of the lattr. For permitting the outer end of the shank 32 of the key to be inserted into the socket 30, I. provide said socket with a tapering mouth 57.

My improved device is simple in construction and 1s strong and durable and not liable i to get out of order. There are few parts and it will be noted that when the handle 46 is I turned for releasing the detent-blocks that either or both of the sashes may be adjusted to position and that after adjustment the handle may be again turned for moving the detent blocks into engagement with the teeth of the spur-gears for definitely locking the sashes in adjusted ositions, the movements of the detent-b ocks being in lines parallel to the radii of said gears for moving the .detent-blocks in lines toward and from the center of said gears and thereby causing positive locking of said gears.

Having thus fully described my invention what I claim as new and desire to secure by Letters Patent is.

1. In a sash balance and lock, the combination with the upper sash and the lower pendently rotatable about a common axis" by the sliding of said sashes, detent-blocks arranged to engage the teeth oi said respective gears, and means for simultaneously moving said detent-blocks substai' tially radially into engagement with and simultaneously retracting the same substantially radially from said teeth.

2. In a sash balance and lock, the combination with the upper and the lower sash and a rack on. each of said sashes extending longitudinally of one of the sides thereof, of a pair of spring-tensioned gears in mesh. with said respective racks and independently rotatable about a common axis by the sliding of said sashes, detent-blocks for the said respective gears, said detent-blocks movable substantially radially of said gears, and means for moving said detent-blocks simultaneo usly.

3. In a sash balance and lock, the combination with the upper sash and the lower sash and a rack on each of said sashes extending longitudinally of one of the sides thereof, of a pair of spring-tensioned gears in mesh with said respective racks and independently rotatable about a common axis by the sliding of said sashes, detent-blocks for said gears, a casing in which said ge-rs are mounted, guideways in said casing extending substantially radial of said gears, and means for shifting said detent-blocks in said guideways between the teeth of said gears for locking the same against rotation in either direction and retracting said detentblocks from said gears.

4. In a sash balance and lock, the combination of a casing, a pair of toothed sprin barrels independently rotatable therein, the teeth of said spring-barrels being adapted to respectively engage racks .on the sashes, detentblocks for making engagement with the said teeth of said toothed spring-barrels, and means for simultaneously releasing said detent-blocks from said. teeth of said pair of spring-barrels and for causing simultaneous engagement of said detent-blocks with said teeth of said pair of spring-barrels said spring-barrels being locked against rotation in either direction when their teeth are en.- gaged by said detent-blocks.

5. In a sash balance and lock, the combination of a casing, a pair of toothed springbarrels independently rotatable therein, a detent-block for each of said toothed springbarrels, said casin provided with guideways for said .letent-b locks extending substantially radial of said toothed spring-barrels, and means for moving said detent-blocks into engagement with the teeth oi said toothed spring-barrels comprising a rockshaft, and means between said rock-shalt and detent-blocks or moving the latter endwise.

6. In a sash balance and lock, the combination of a casing, a pair of toothed springbarrels independently rotatable therein, a detent-block for each of said toothed springbarrels, said casing provided with guideways for said detentocks extending substantially radial of said toothed spring-barrels, means for simultaneously moving said detent-blocks into engagement with the teeth of said toothed spring-barrels comprising a rock-shaft and means between said rockshaft and detent-blocks for operating said detentblocks, said rock-shaft having a bore terminating in a reduced end of polygonal cross-section, and a key of polygonal crosssection arranged to extend into said bore different distances through said reduced end for accommodating window stiles of different thicknesses, the walls of said bore being spaced from the sides of said key except at said reduced end.

7. In a sash balance and lock, the combination of a casing, a pair 01" toothed springbarrels independently rotatable therein, a detent-block for each oi said toothed springbarrels, said casmg provided with guideways for said detent-blocks extending substantially radial o1 said toothed spring-barrels, means for simultaneously moving said detent-blocks into engagement with said toothed spring-barrels comprising a rockshaft and means between said rock-shaft and detent-blocks for moving said detent-blocks end-wise, said rock-shaft having a bore terminating in a reduced end of polygonal crosssection, a key provided with a shank of polygonal cross-section arranged to extend through said reduced end into said bore different distances for accommodating window stiles of different thicknesses, said key having a handle which extends to both sides of the longitudinal axis of said shank and positioning means for said key.

8. In a sash balance and lock, the combination of a gear-casing, a rock-shaft journaled in said gear-casing, a pair of toothed spring-barrels independently rotatable in said gear-casing, a detent-block for each of said toothed spring-barrels, said rock-shaft having operative connection with said detent blocks for moving the latter into and out of engagement with said toothed spring-barrels, said rock-shaft having a bore terminating in a reduced end of polygonal cross-section provided at its outer end with a tapered mouth, and a key received within said tapering mouth and reduced end, substantially as and for the purposes specified.

9. In a sash balance and lock, the combination of a casing, toothed spring-barrels having common rotary axes rotatable independently therein, detent-blocks for said toothed spring-barrels movable substantially radial of the same, the side faces 01" said detent-blocks being provided with recesses, and a rock-shalt having lugs received by said recesses and engaging the end walls of said recesses for moving said detent-blocks toward and from said toothed spring-barrels, said detent-blocks arranged to be received between the teeth of said toothed spring-barrels for locking said spring-barrels against rotation in either direction.

In testimony whereof, I have hereunto subscribed my name in the presence of two subscribing witnesses.

FRANK D. ANTHE.

l/Vitnesses ADELE MEININGER, COLEMAN AVERY. 

